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b=M9geGo424bXd6/uG8WL7qxlYMBC2Osxy/EUu6rWhoOMyPRB3P0sBI+IWLSoGSSu2y DHoKgy21QJrxKbiT4TLE5rauohLbNtI1oJbcsqXmrSrrnDtW6q1CSvfjicb0vzsW4q 01nSwQFjX2ienHTrFSxXCw7XuSMUG8nXZd0FQpX9HNWnVxfDKhKwp5NjZ35b67Cdo4 tw9drIN8LE4pYl2eWMyH9QrLB8XG0ZtoYXJmDdICtgYVa1PwtdaJOcXtmOzkkhP3R4 crLQcIZlQjY6BsNh8WPH33PT3gcOF0zU5GS6aQ3pi4Cv+w+fHT6w7TaJQf5iTmpPto 6yR8Blx/5U8hA== From: Leon Romanovsky To: Alex Williamson Cc: Vivek Kasireddy , Christoph Hellwig , Jason Gunthorpe , Andrew Morton , Bjorn Helgaas , =?UTF-8?q?Christian=20K=C3=B6nig?= , dri-devel@lists.freedesktop.org, iommu@lists.linux.dev, Jens Axboe , =?UTF-8?q?J=C3=A9r=C3=B4me=20Glisse?= , Joerg Roedel , kvm@vger.kernel.org, linaro-mm-sig@lists.linaro.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, linux-mm@kvack.org, linux-pci@vger.kernel.org, Logan Gunthorpe , Marek Szyprowski , Robin Murphy , Sumit Semwal , Will Deacon Subject: [PATCH 07/10] vfio: Export vfio device get and put registration helpers Date: Wed, 23 Jul 2025 16:00:08 +0300 Message-ID: <045df5fc463bbac4c669413fabd4d22e54b58c87.1753274085.git.leonro@nvidia.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: F0F13A0003 X-Rspam-User: X-Rspamd-Server: rspam09 X-Stat-Signature: wgf9xxpkc98etj99jm6wt818kab7a9uk X-HE-Tag: 1753275754-928157 X-HE-Meta: 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 vVhU9+UJ 54jfFxX+iEHAcEOHT+rT8uH/0Rpo3QsGKUY5KItg2OuGAJQAlHkTlJYN07i8c2t43EogDI5mGfZefXG649vM+OgtlcAV3UVOsyvfm4I4LeCe4vmE+0D5l+SiIF4VhrcLDT3tX94Sdbr2CJyKRwH6aoTdAEBotBbMJIqnk/fAmHZqYYzq25pJ+fo661suKk7CtzfRLMDDTypfdhpxlVTpu2HC1GtsbpX8KxWTziIqhJURdjhoiKZ4n6OAayJNmL2/6/g00 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: Vivek Kasireddy These helpers are useful for managing additional references taken on the device from other associated VFIO modules. Signed-off-by: Jason Gunthorpe Signed-off-by: Vivek Kasireddy Signed-off-by: Leon Romanovsky --- drivers/vfio/vfio_main.c | 2 ++ include/linux/vfio.h | 2 ++ 2 files changed, 4 insertions(+) diff --git a/drivers/vfio/vfio_main.c b/drivers/vfio/vfio_main.c index 1fd261efc582d..620a3ee5d04db 100644 --- a/drivers/vfio/vfio_main.c +++ b/drivers/vfio/vfio_main.c @@ -171,11 +171,13 @@ void vfio_device_put_registration(struct vfio_device *device) if (refcount_dec_and_test(&device->refcount)) complete(&device->comp); } +EXPORT_SYMBOL_GPL(vfio_device_put_registration); bool vfio_device_try_get_registration(struct vfio_device *device) { return refcount_inc_not_zero(&device->refcount); } +EXPORT_SYMBOL_GPL(vfio_device_try_get_registration); /* * VFIO driver API diff --git a/include/linux/vfio.h b/include/linux/vfio.h index 707b00772ce1f..ba65bbdffd0b2 100644 --- a/include/linux/vfio.h +++ b/include/linux/vfio.h @@ -293,6 +293,8 @@ static inline void vfio_put_device(struct vfio_device *device) int vfio_register_group_dev(struct vfio_device *device); int vfio_register_emulated_iommu_dev(struct vfio_device *device); void vfio_unregister_group_dev(struct vfio_device *device); +bool vfio_device_try_get_registration(struct vfio_device *device); +void vfio_device_put_registration(struct vfio_device *device); int vfio_assign_device_set(struct vfio_device *device, void *set_id); unsigned int vfio_device_set_open_count(struct vfio_device_set *dev_set); -- 2.50.1